1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25f410efb767bc826396ba574f16879e683125d0d940897c1329329fddbb6aa. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90ecc093-7083-461e-9b4c-0f5e1544e8f8.json and https://artists.proofprofile.net/proofs/artist/90ecc093-7083-461e-9b4c-0f5e1544e8f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b5df93cc4f308f050fad1b712905778b18ae6e03903a4e898ad2cacac49c0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252201244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eea6a149862a64643cc861e1068d657b93c28f2ad4db18581926fcb1053bb0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252208195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bad850b3c6068d3c6d947bee60801a059532b711525f7b538fb0a40ea0936aa. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252308158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941507b57083db89f05dc7b8ba02109c409c2eaeb8399e8fc93f6cf5d16512b9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:07:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252310765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea20b973822c00fa0325532bf03e4162ec4f67ba4455f7dc056224b3504a94f. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252312134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662706b7d609ffdd28998769c01ac1498f3b822c9ea919e708e2ff4fddfe47b0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252312135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4f0c43d56bfa2380b17a53216dc1f4e34b9379d239a1a3e342476e0f4db2fe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252403815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0c6383a7ba4970a98cd2d21c2f5561c76f9fb38a1971eb738b2f170c13ba5d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/EGA252500344.